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| <span class="navbar-text navbar-version pull-left"><b>v03.00.05</b></span> |
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| <li class="toctree-l1"><a class="reference internal" href="../../../index.html">1. NXP Plug & Trust Middleware</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../organization-of-documentation.html">1.1. Organization of Documentation</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../folder-structure.html">1.2. Folder Structure</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../sw-prerequisites.html">1.3. List of Platform Prerequisites</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../changes/index.html">2. Changes</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/pending.html">2.1. Pending Refactoring items</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/pending.html#known-limitations">2.2. Known limitations</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v03_00_05.html">2.3. Release <code class="docutils literal notranslate"><span class="pre">v03.00.05</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v03_00_04.html">2.4. Release <code class="docutils literal notranslate"><span class="pre">v03.00.04</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v03_00_03.html">2.5. Release <code class="docutils literal notranslate"><span class="pre">v03.00.03</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v03_00_02.html">2.6. Release <code class="docutils literal notranslate"><span class="pre">v03.00.02</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_16_01.html">2.7. Release <code class="docutils literal notranslate"><span class="pre">v02.16.01</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_16_00.html">2.8. Release <code class="docutils literal notranslate"><span class="pre">v02.16.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_15_00.html">2.9. Release <code class="docutils literal notranslate"><span class="pre">v02.15.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_14_00.html">2.10. Release <code class="docutils literal notranslate"><span class="pre">v02.14.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_12_00.html">2.11. Release <code class="docutils literal notranslate"><span class="pre">v02.12.05</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_12_00.html#release-v02-12-04">2.12. Release <code class="docutils literal notranslate"><span class="pre">v02.12.04</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_12_00.html#release-v02-12-03">2.13. Release <code class="docutils literal notranslate"><span class="pre">v02.12.03</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_12_00.html#release-v02-12-02">2.14. Release <code class="docutils literal notranslate"><span class="pre">v02.12.02</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_12_00.html#release-v02-12-01">2.15. Release <code class="docutils literal notranslate"><span class="pre">v02.12.01</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_12_00.html#release-v02-12-00">2.16. Release <code class="docutils literal notranslate"><span class="pre">v02.12.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_11_03.html">2.17. Release <code class="docutils literal notranslate"><span class="pre">v02.11.03</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_11_01.html">2.18. Internal Release <code class="docutils literal notranslate"><span class="pre">v02.11.01</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_11_00.html">2.19. Release <code class="docutils literal notranslate"><span class="pre">v02.11.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_10_00.html">2.20. Release <code class="docutils literal notranslate"><span class="pre">v02.10.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_09_00.html">2.21. Release <code class="docutils literal notranslate"><span class="pre">v02.09.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_07_00.html">2.22. Release <code class="docutils literal notranslate"><span class="pre">v02.07.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_06_00.html">2.23. Release <code class="docutils literal notranslate"><span class="pre">v02.06.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_05_00_to_v02_03_00.html">2.24. Release <code class="docutils literal notranslate"><span class="pre">v02.05.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_05_00_to_v02_03_00.html#release-v02-04-00">2.25. Release <code class="docutils literal notranslate"><span class="pre">v02.04.00</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../changes/v02_05_00_to_v02_03_00.html#release-02-03-00">2.26. Release <code class="docutils literal notranslate"><span class="pre">02.03.00</span></code></a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../stack/index.html">3. Plug & Trust MW Stack</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/features.html">3.1. Features</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/features.html#plug-trust-mw-block-diagram">3.2. Plug & Trust MW : Block Diagram</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../sss-apis.html">3.3. SSS APIs</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/se05xfeatures.html">3.4. SSS APIs: SE051 vs SE050</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/param_checks.html">3.5. Parameter Check & Conventions</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/i2cm.html">3.6. I2CM / Secure Sensor</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/logging.html">3.7. Logging</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/feature-file.html">3.8. Feature File - <code class="docutils literal notranslate"><span class="pre">fsl_sss_ftr.h</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/platf-scp-from-fs.html">3.9. Using Platform SCP Keys from File System</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/auth/auth-objects.html">3.10. Auth Objects</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/auth/auth-objects-userid.html">3.11. Auth Objects : UserID</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/auth/auth-objects-aeskey.html">3.12. Auth Objects : AESKey</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/auth/auth-objects-eckey.html">3.13. Auth Objects : ECKey</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/key-id-range.html">3.14. Key Id Range and Purpose</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/key-id-range.html#authentication-keys">3.15. Authentication Keys</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../stack/key-id-range.html#trust-provisioned-keyids">3.16. Trust provisioned KeyIDs</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../ex/doc/puf-scp03.html">3.17. SCP03 with PUF</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../doc/sss_heap_management.html">3.18. SSS Heap Management</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../building/index.html">4. Building / Compiling</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../building/windows.html">4.1. Windows Build</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../building/frdm-k64f-sdk.html">4.2. Import MCUXPresso projects from SDK</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../building/frdm-k64f-cmake.html">4.3. Freedom K64F Build (CMake - Advanced)</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../building/imx6.html">4.4. i.MX Linux Build</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../building/rpi3.html">4.5. Raspberry Pi Build</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../building/cmake.html">4.6. CMake</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../scripts/cmake_options.html">4.7. CMake Options</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../demos/index.html">5. Demo and Examples</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#demo-list">5.1. Demo List</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#sss-api-examples">5.2. SSS API Examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#cloud-demos">5.3. Cloud Demos</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#linux-specific-demos">5.4. Linux Specific Demos</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#opc-ua-example">5.5. OPC-UA Example</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#arm-psa-example">5.6. ARM PSA Example</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#se05x-examples">5.7. SE05X Examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#openssl-examples">5.8. OpenSSL Examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#tests-for-user-crypto">5.9. Tests for User Crypto</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#nxpnfcrdlib-examples">5.10. NXPNFCRDLIB examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#ease-of-use-examples">5.11. Ease-of-Use examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#semslite-examples">5.12. Semslite examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/index.html#puf-examples">5.13. PUF examples</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../edgelock2go-agent.html">6. NXP EdgeLock 2GO Agent</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../nxp_iot_agent/doc/introduction.html">6.1. Introduction</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../nxp_iot_agent/doc/introduction.html#building-and-running-the-edgelock-2go-agent">6.2. Building and running the EdgeLock 2GO agent</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../nxp_iot_agent/doc/introduction.html#datastore-keystore">6.3. Datastore / Keystore</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../nxp_iot_agent/doc/introduction.html#connection-to-the-edgelock-2go-cloud-service">6.4. Connection to the EdgeLock 2GO cloud service</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../nxp_iot_agent/doc/introduction.html#claim-codes">6.5. Claim Codes</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../nxp_iot_agent/doc/edgelock2go_agent_apis.html">6.6. API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../nxp_iot_agent/doc/readme_usage_examples.html">6.7. Usage Examples</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../semslite/doc/index.html">7. SEMS Lite Agent</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../semslite/doc/sems_lite_overview.html">7.1. SEMS Lite Overview (Only for SE051)</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../semslite/doc/sems_lite_package.html">7.2. Update Package</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../semslite/doc/sems_lite_usage.html">7.3. SEMS Lite Agent Usage</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../semslite/doc/sems_lite_mgmt_api.html">7.4. SEMS Lite management APIs</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../semslite/doc/sems_lite_process.html">7.5. SEMS Lite Agent Package Load Process</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../semslite/doc/sems_lite_api.html">7.6. APIs</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../semslite/doc/sems_lite_known_issue.html">7.7. SEMS Lite Known Issue</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../semslite/doc/demo_update.html">7.8. SEMS Lite DEMOs</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1 current"><a class="reference internal" href="../../../plugins/index.html">8. Plugins / Add-ins</a><ul class="current"> |
| <li class="toctree-l2"><a class="reference internal" href="../openssl/scripts/readme.html">8.1. Introduction on OpenSSL engine</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../mbedtls/scripts/readme.html">8.2. Introduction on mbedTLS ALT Implementation</a></li> |
| <li class="toctree-l2 current"><a class="current reference internal" href="#">8.3. Platform Security Architecture</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../plugins/akm.html">8.4. Android Key master</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../open62541/readme.html">8.5. Introduction on Open62541 (OPC UA stack)</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../plugins/wifiEAP/wifiEAP.html">8.6. WiFi EAP Demo with Raspberry Pi3</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../plugins/pkcs11.html">8.7. PKCS#11 Standalone Library</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../cli-tool.html">9. CLI Tool</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/doc/introduction.html">9.1. Introduction</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/doc/block-diagram.html">9.2. Block Diagram</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/doc/pre-steps.html">9.3. Steps needed before running <code class="docutils literal notranslate"><span class="pre">ssscli</span></code> tool</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/doc/running.html">9.4. Running the <code class="docutils literal notranslate"><span class="pre">ssscli</span></code> tool - Windows</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/Provisioning/readme.html">9.5. CLI Provisioning</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/doc/readme_usage_examples.html">9.6. Usage Examples</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/doc/cli_commands_list.html">9.7. List of <code class="docutils literal notranslate"><span class="pre">ssscli</span></code> commands</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/doc/cli_data_format.html">9.8. CLI Data formats</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../pycli/doc/cli_object_policy.html">9.9. Object Policies Through ssscli</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/upload_se05x_using_pycli.html">9.10. Upload keys and certificates to SE05X using ssscli tool</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../a71ch.html">10. A71CH</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../a71ch/a71ch_sss.html">10.1. A71CH and SSS API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../a71ch/a71ch_miscellaneous.html">10.2. Miscellaneous</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../a71ch/a71ch_legacy_host_api.html">10.3. A71CH Legacy API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../a71ch/a71ch_legacy_hlse_api.html">10.4. A71CH Legacy HLSE (Generic) API</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../a71ch/a71ch_configure_tool.html">10.5. A71CH Legacy Configure Tool</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../../../appendix.html">11. Appendix</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/glossary.html">11.1. Glossary</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/vcom.html">11.2. APDU Commands over VCOM</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/vs2019-setup.html">11.3. Visual Studio 2019 Setup</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/ide_mcux.html">11.4. Setting up MCUXPresso IDE</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../dev-platforms.html">11.5. Development Platforms</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/se_uid.html">11.6. How to get SE Platform Information and UID</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/version_info.html">11.7. Version Information</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../demos/Certificate_Chains/Readme.html">11.8. Certificate Chains</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/rjct_server.html">11.9. JRCP_v1 Server</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/platfscp.html">11.10. Using own Platform SCP03 Keys</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../appendix/apdu_write_to_buffer.html">11.11. Write APDU to buffer</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="../../../api/api_list.html">11.12. Plug & Trust MW APIs</a></li> |
| </ul> |
| </li> |
| </ul> |
| </ul> |
| </li> |
| |
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| <div class="section" id="platform-security-architecture"> |
| <span id="psa-alt"></span><h1><span class="section-number">8.3. </span>Platform Security Architecture<a class="headerlink" href="#platform-security-architecture" title="Permalink to this headline">¶</a></h1> |
| <p>The Platform Security Architecture (PSA) by ARM is a holistic set |
| of threat models, security analyses, hardware and firmware |
| architecture specifications, and an open source firmware |
| reference implementation.</p> |
| <p>ARMmbed provides an interface for PSA APIs as a part of its mbed-crypto |
| project. Also, it supports SE driver interface which allows the user to |
| use its own implementation for PSA cryptographic functions. This is useful |
| for integrating Secure Element with mbed-crypto provided PSA interface.</p> |
| <p>For details on PSA specification, refer to <a class="reference external" href="https://armmbed.github.io/mbed-crypto/html/index.html">ARMmbed PSA Specification</a>.</p> |
| <div class="section" id="psa-se-driver-interface"> |
| <h2><span class="section-number">8.3.1. </span>PSA SE Driver Interface<a class="headerlink" href="#psa-se-driver-interface" title="Permalink to this headline">¶</a></h2> |
| <p>The SE Driver interface allows the user to register Secure Element drivers |
| for various cryptographic operations. It is not necessary that one driver |
| should offer all cryptographic functionalities, we can register up to 4 drivers |
| which may offer different functionalities.</p> |
| <p>Cryptographic APIs are split in to the following :</p> |
| <ul class="simple"> |
| <li><p>SE_KEY_MANAGEMENT - Key management APIs like import/generate/destroy</p></li> |
| <li><p>SE_MAC - Mac operations</p></li> |
| <li><p>SE_CIPHER - Symmetric encrypt/decrypt operations</p></li> |
| <li><p>SE_AEAD - AEAD/GCM operations</p></li> |
| <li><p>SE_ASYMMETRIC - Asymmetric sign/verify/encrypt/decrypt operations</p></li> |
| <li><p>SE_KEY_DERIVATION - Key derivation operations</p></li> |
| </ul> |
| <p>The driver may support any subset of cryptographic functionalities, mbed-crypto |
| offers software fall-back for APIs unavailable from SE.</p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>For SE interface, currently only SE_KEY_MANAGEMENT APIs, and asymmetric sign and |
| asymmetric verify APIs are supported.</p> |
| </div> |
| </div> |
| <div class="section" id="psa-concepts"> |
| <h2><span class="section-number">8.3.2. </span>PSA Concepts<a class="headerlink" href="#psa-concepts" title="Permalink to this headline">¶</a></h2> |
| <dl> |
| <dt><strong>Lifetime</strong></dt><dd><p>The lifetime of an object refers to its persistence. An object can |
| either be <code class="docutils literal notranslate"><span class="pre">PERSISTENT</span></code> or <code class="docutils literal notranslate"><span class="pre">VOLATILE</span></code>. However, for SE based PSA |
| implementation, it refers to the module ID of SE Driver. Lifetime |
| identifies the scope of an object (where the object is stored and |
| which operations are available for it). This is used while performing |
| any operation on an object. We can use different lifetimes while |
| performing operations with the same object as long as different |
| drivers can access the object.</p> |
| </dd> |
| <dt><strong>Slot ID</strong></dt><dd><p>This is a 64-bit ID indicating where the object is loaded in the library. |
| PSA offers a maximum of 31 slots, which indicates that at a time, a |
| maximum of 31 objects can be used for any operation. If an object is |
| not being used, the object handle can be closed to free the slot. Since |
| there is no concept of an object being loaded for SE, the Slot ID will |
| refer to the Key ID of the object. Any application will remain unaware |
| of Slot ID and this should be managed internally. PSA library should |
| use this value to refer to any object.</p> |
| <p>For SSS based PSA implementation, we have a 1:1 mapping of Slot ID from |
| Key ID.</p> |
| <p>Also see <a class="reference internal" href="#psa-alt-keyids"><span class="std std-ref">Managing KeyIDs</span></a>.</p> |
| </dd> |
| <dt><strong>Key ID</strong></dt><dd><p>This is a 32-bit ID indicating the file name of the object which will be |
| stored on the file system. Apart from the actual object, PSA also maintains |
| an object file which will store metadata of the object such as policies and |
| supported algorithms. Before performing any operation, these values are validated. |
| The applications will use this value to refer to any object.</p> |
| <p>For SSS based PSA implementation, the contents of this file may also stored |
| on SE.</p> |
| <p>Also see <a class="reference internal" href="#psa-alt-keyids"><span class="std std-ref">Managing KeyIDs</span></a>.</p> |
| </dd> |
| <dt><strong>PSA Objects</strong></dt><dd><ul> |
| <li><p><strong>LIFETIME_FILE</strong> - This is SE specific file which can contain SE(driver) specific |
| persistent data</p></li> |
| <li><p><strong>TRANSACTION_FILE</strong> - This is a temporary file created at the time of any operation. |
| It will be deleted after the operation. This is also used to continue a pending |
| operation if, in case, the system reboots.</p></li> |
| <li><p><strong>OBJECT_FILE</strong> - This file corresponds to any object we create inside the SE. It |
| will store data about policy, supported algorithms, etc.</p> |
| <p>(keyID range is 0x20000000 - 0x2FFFFFFF)</p> |
| </li> |
| <li><p><strong>OBJECT</strong> - This is the actual object created inside the SE.</p> |
| <p>(keyID range is 0x30000000 - 0x3FFFFFFF)</p> |
| </li> |
| </ul> |
| <p>For any provided Key ID, the most significant nibble is masked out. The effective Key ID is |
| 28-bit long. Also see <a class="reference internal" href="#psa-alt-keyids"><span class="std std-ref">Managing KeyIDs</span></a>.</p> |
| <div class="admonition warning"> |
| <p class="admonition-title">Warning</p> |
| <p>This logic of managing KeyIDs of various PSA objects is temporary and |
| it will be changed in the future.</p> |
| </div> |
| </dd> |
| </dl> |
| </div> |
| <div class="section" id="managing-keyids"> |
| <span id="psa-alt-keyids"></span><h2><span class="section-number">8.3.3. </span>Managing KeyIDs<a class="headerlink" href="#managing-keyids" title="Permalink to this headline">¶</a></h2> |
| <p>Application can provide any keyID to be used with SE. |
| This will be mapped directly (1:1) with the slotID. |
| For internal usage, it is mapped to a 28-bit ID, masking |
| out the most significant nibble. Of all PSA objects, |
| <strong>lifetime file</strong>, <strong>transaction file</strong> and <strong>secure objects</strong> |
| will always be stored in secure element. The application |
| has an option to choose the storage for object metadata |
| files.</p> |
| <p>Providing the mask <code class="docutils literal notranslate"><span class="pre">#define</span> <span class="pre">PSA_ALT_ITS_SE_FLAG</span> <span class="pre">((0x1)</span> <span class="pre"><<</span> <span class="pre">28)</span></code> |
| in the keyID will ensure that object file is stored |
| in secure element. If this flag is not set, object file |
| will be stored in flash memory.</p> |
| <p>Flash storage currently has support to store only up to |
| 8 object files.</p> |
| </div> |
| <div class="section" id="building-psa-for-trustzone"> |
| <span id="psa-alt-building"></span><h2><span class="section-number">8.3.4. </span>Building PSA for TrustZone<a class="headerlink" href="#building-psa-for-trustzone" title="Permalink to this headline">¶</a></h2> |
| <p>PSA library is intended to run in ARM TrustZone. All examples will run in normal |
| world and link to PSA library to perform cryptographic operations. Build the library |
| for TrustZone with the following CMake configurations:</p> |
| <ul class="simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">Host=lpcxpresso55s_s</span></code></p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">HostCrypto=MBEDCRYPTO</span></code></p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">RTOS=Default</span></code></p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">SMCOM=T1oI2C</span></code></p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">PROJECT=PSA_ALT</span></code></p></li> |
| </ul> |
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